Ok as soon as you enter a woman that is sex, it doesn't matter how deep you go or how long it lasts.
Yes any time you put your penis inside a womans vagina you can make her pregnant
yes if you come in, on, or near a womans vagina that sperm can get inside and get her pregnant.
Why take the risk, get birth control and use condoms or don't fool around with sex.
What would you do if you were faced with parenthood??
Sex leads to babies.